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Poor mans project(air cooler)

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JoeK

07-24-2002 17:37:23




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Need a cooler condenser for my samdblasted cabinet air.Water trap and coalescing filters are working but air is still hot and carrying vapor.I am looking at a coil of flexible metal tubing inside a 5-6 gal plastic bucket,filled with cold or ice water to cool air flowing thru the tubing.I have on hand the 3/8 aluminum coil from a dehumidfyer and a coil of 3/8 soft plumbing copper.Will EITHER of these hold the max 125 PSI pressure or do I need to go to something stronger?
Very tight budget(no income)at present.Max time of use would be appx 1hr at a time,Any thoughts suggestions appreciated.Trap and moisture filter would be downstream of cooler.

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fzbcheve

07-25-2002 18:47:02




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 Re: Poor mans project(air cooler) in reply to JoeK, 07-24-2002 17:37:23  
have been using an automotive AC evaperator for years. Have a small fan behind the coil,and it works just fine. Use coil from a large car or truck. the bigger the better. the coils are heavy can be taped for 1/2 pipe. The coils will stand over 300 pounds pressure.



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Rod (NH)

07-24-2002 19:09:00




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 Re: Poor mans project(air cooler) in reply to JoeK, 07-24-2002 17:37:23  
Hi there JoeK,

I don't know about the aluminum but you should have no problem with the copper tubing at that pressure. If you wish, you can refine the allowable pressures...depending on actual type and wall thickness...by reviewing the material at the link below. I believe you will find all of them are in excess of 125 psi. For most installations with copper tubing that has soft soldered joints though, the solder joint is the weak link and is very dependent on type of solder (e.g. 50/50 or 95/5) and the operating temperature. This info is also provided in the same link.

Rod

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